Using Nightly.2015Nov07.6D116. During recording 60fps MLV RAW at resolutions 1824x466 & 1280x326 (didn't try other resolutions), pressing "Loop" button causes EOS-6D camera to stall with a frozen LV. Battery removal is required to reset the camera. After restart everything acts normally. The bug is stable and easily repeatable.
Issue #2406 duplicate